Omron A3SA-90B1-12SR Equivalent & Substitute Parts

Part Overview

The Omron A3SA-90B1-12SR is an illuminated pushbutton switch with SPDT circuit configuration, designed for panel mount snap-in installation. This component features a red LED illumination at 12 VAC/DC nominal voltage and red square button actuator. The part is classified as obsolete, necessitating identification of active equivalent models to maintain supply chain continuity for new designs and ongoing production requirements.

Substiute Parts

A3SA-90B1-12SR

Omron Automation and SafetyIn Stock: 814A3SA-90B1-12SR Datasheet

Current PartRFQ

A3SA-90B1-12ER

Omron Automation and SafetyIn Stock: 999A3SA-90B1-12ER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A3SA-90B1-12SR is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPDT)
• Switch function (On-On)
• Current ratings (3A AC / 2A DC minimum)
• Voltage ratings (125V AC / 30V DC minimum)
• Mounting type (Panel Mount, Snap-In)
• Actuator type and color (Square, Button, Red)
• Illumination type and color (LED, Red)
• Termination style (Quick Connect - 0.110")
• Panel cutout dimensions (Square - 16.20mm x 16.20mm)
• Operating temperature range (-10°C ~ 50°C)
• Mechanical and electrical life (100,000 Cycles)
• Ingress protection rating (IP00)

Substitutes must maintain identical electrical performance, mechanical interface, and physical form factor. Variations in illumination voltage specification do not preclude substitution when the substitute operates within the same nominal voltage class.

Parameter Comparison

Engineering Selection Recommendations

The A3SA-90B1-12ER is the manufacturer-recommended substitute for the obsolete A3SA-90B1-12SR. Both components are from the Omron A3S series and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the A3SA-90B1-12SR is obsolete, while the A3SA-90B1-12ER is active and currently in production.

The illumination voltage specification differs slightly between the two parts (12 VAC/DC versus 12 VDC), but both operate within the same nominal voltage class and are functionally compatible in applications requiring 12V illumination supply.

For new designs and ongoing production, the A3SA-90B1-12ER should be selected to ensure long-term component availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the A3SA-90B1-12ER directly replace the A3SA-90B1-12SR in existing applications?

A: Yes. Both components share identical electrical ratings (3A AC / 2A DC, 125V AC / 30V DC), circuit configuration (SPDT), mechanical interface (panel mount snap-in), and physical dimensions (16.20mm square cutout). The A3SA-90B1-12ER is the active production equivalent.

Q: What is the difference between 12 VAC/DC and 12 VDC illumination voltage specifications?

A: The A3SA-90B1-12SR supports illumination at both 12 VAC and 12 VDC. The A3SA-90B1-12ER supports illumination at 12 VDC. In applications using 12 VDC illumination supply, both parts are functionally equivalent. Applications requiring 12 VAC illumination should retain the original part or confirm compatibility with the substitute.

Q: Are the quick-connect terminations identical between these parts?

A: Yes. Both components use Quick Connect - 0.110" (2.8mm) termination style, ensuring identical connector compatibility and installation procedures.

Q: What is the mechanical and electrical life expectancy for these switches?

A: Both the A3SA-90B1-12SR and A3SA-90B1-12ER are rated for 100,000 mechanical cycles and 100,000 electrical cycles under specified operating conditions.

Q: Are there any certifications or compliance differences between these parts?

A: Both components are manufactured by Omron Automation and Safety and belong to the A3S series. No compliance or certification differences are specified in the provided technical data.